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TV wall mount in a townhouse - is behind wall wiring possible?

We are moving into a town house development on the 6th of September. We want to get our 50 inch TV mounted to the wall with the wiring behind the wall (We already have a 50 inch wall mount bracket). It should be noted that the wall the TV must go in is the wall that joins with another town house unit. We want to know if its possible to do this easily and cost effectively, without having to take GIB and walls down! I have heard that sometimes this isn't possibly with townhouse/adjoining dwellings. If needed I can privately send you a photo of the house plans, or you can come view it for yourself. I don't have the tools or skills to put wiring behind walls, especially in adjoining walls. Attached is a picture showing where the power point etc is. Can you please let me know your thoughts, and an idea of cost? Thank you.